* configure.in (HAVE_AS_GDWARF2_DEBUG_FLAG): Define.
	(HAVE_AS_GSTABS_DEBUG_FLAG): Define.
	* configure: Regenerate.
	* config.in: Add dummy definitions of new flags.
	* toplev.c (PREFERRED_DEBUGGING_TYPE): Move definition to...
	* defaults.h (PREFERRED_DEBUGGING_TYPE): ... here.
	* gcc.c (ASM_DEBUG_SPEC): New macro.
	(asm_debug): New static variable.
	(default_compilers): Add asm_debug when assembling from
	user input.
	(static_specs): Add asm_debug.

From-SVN: r47210